<template>
  

<el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
        <div>
            <img src="../assets/heima.png" alt="">  
            <span>电商后台管理系统</span>
        </div>
       <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse? '64px':'200px'" >
            <div class="toggle-button" @click="toggleCollapse">|||</div>
         <el-menu background-color="#333744"  
         text-color="#fff" active-text-color="#409EFF" unique-opened
         :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
             <!-- unique-opened只显示一个打开的菜单 -->
      <!-- 一级导航 -->
      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id"> 
        <template slot="title">
          <i :class="iconsObj[item.id]"></i>
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级导航 -->
          <el-menu-item :index="'/'+subItem.path" 
          v-for="subItem in item.children" :key="subItem.id" 
          @click="saveNavState('/' + subItem.path)">
           <template slot="title">
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
           </template>
          </el-menu-item>
      
      </el-submenu>
   
    </el-menu>
        </el-aside>
        <!-- 主体区域 -->
        <el-main>
            <router-view></router-view>
        </el-main>
    </el-container>
</el-container>
</template>

<script>
    export default {
       created(){
           this.getMenuList()
            this.activePath = window.sessionStorage.getItem('activePath')
       },
        data(){
            return{
                 menulist: [],
                 iconsObj: {
                        '125': 'iconfont icon-user',
                        '103': 'iconfont icon-tijikongjian',
                        '101': 'iconfont icon-shangpin',
                        '102': 'iconfont icon-danju',
                        '145': 'iconfont icon-baobiao'
                    },
                     // 是否折叠
                 isCollapse: false,
                 activePath:""
            }
        },
        methods:{
            logout(){
                window.sessionStorage.clear()
                this.$router.push("/login")
            },
        async getMenuList(){
            const {data:res} = await this.$http.get("menus")
            if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
                 this.menulist = res.data
            },
            toggleCollapse(){
                 this.isCollapse = !this.isCollapse
            },
            saveNavState(activePath){
                 window.sessionStorage.setItem('activePath', activePath)
                this.activePath = activePath
            }
        }
    }
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  padding-left: 0;
  font-size: 20px;
  > div {
      display: flex;
      align-items: center;
      span{
          margin-left: 15px;
      }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
      border-right: none;// 左侧对齐
  }
}
.el-main {
  background-color: #eaedf1;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>